GB1167270A - Improved Method and Apparatus for Testing the State of Stress in a Solid especially Soil - Google Patents

Improved Method and Apparatus for Testing the State of Stress in a Solid especially Soil

Info

Publication number
GB1167270A
GB1167270A GB4455767A GB4455767A GB1167270A GB 1167270 A GB1167270 A GB 1167270A GB 4455767 A GB4455767 A GB 4455767A GB 4455767 A GB4455767 A GB 4455767A GB 1167270 A GB1167270 A GB 1167270A
Authority
GB
United Kingdom
Prior art keywords
stress
testing
state
improved method
sept
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB4455767A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NAC DE ENGENHARIA CIVIL LAB
Original Assignee
NAC DE ENGENHARIA CIVIL LAB
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by NAC DE ENGENHARIA CIVIL LAB filed Critical NAC DE ENGENHARIA CIVIL LAB
Publication of GB1167270A publication Critical patent/GB1167270A/en
Expired legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B49/00—Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells
    • E21B49/006—Measuring wall stresses in the borehole

Abstract

1,167,270. Measuring stress in solids electrically. LABORATORIO NACIONAL DE ENGENHARIA CIVIL. Sept. 29, 1967 [Sept. 29, 1966], No.44557/67. Heading G1N. Apparatus for determining the stress in e.g. soil or rock, comprises a tapered cylinder of plastic material which has embedded in it a number of resistance strain gauges aligned in different directions to determine the magnitude and direction of the local stress. The cylinder is let into a borehole, secured to the wall by the same plastic material, and subsequently removed by cutting out a much larger core, the change in stress shown by the strain gauges being indicative of the initial stress in the solid.
GB4455767A 1966-09-29 1967-09-29 Improved Method and Apparatus for Testing the State of Stress in a Solid especially Soil Expired GB1167270A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PT4648466 1966-09-29

Publications (1)

Publication Number Publication Date
GB1167270A true GB1167270A (en) 1969-10-15

Family

ID=20081645

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4455767A Expired GB1167270A (en) 1966-09-29 1967-09-29 Improved Method and Apparatus for Testing the State of Stress in a Solid especially Soil

Country Status (4)

Country Link
JP (1) JPS4812809B1 (en)
DE (1) DE1634453A1 (en)
ES (1) ES345498A1 (en)
GB (1) GB1167270A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0344926A1 (en) * 1988-05-06 1989-12-06 Eti Explosives Material stress monitor
EP0590987A2 (en) * 1992-10-01 1994-04-06 Halliburton Company Determining orientation of a wellbore relative to formation stress fields

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0344926A1 (en) * 1988-05-06 1989-12-06 Eti Explosives Material stress monitor
US4962668A (en) * 1988-05-06 1990-10-16 Preston Christoper J Material stress monitor
EP0590987A2 (en) * 1992-10-01 1994-04-06 Halliburton Company Determining orientation of a wellbore relative to formation stress fields
EP0590987A3 (en) * 1992-10-01 1995-02-22 Halliburton Co Determining orientation of a wellbore relative to formation stress fields.

Also Published As

Publication number Publication date
ES345498A1 (en) 1968-11-16
JPS4812809B1 (en) 1973-04-23
DE1634453A1 (en) 1970-10-29

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Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees